Charge severing mechanism



Feb. 19, 1935.

c. w. SCHREIBER ET AL CHARGE SEVERING MECHANISM Filed April 18, 1933 9Sheets-Sheet 1 gwoentws c. w. SCHREIYBVER El AL 1,991,705

CHARGE SEVERING MECHANISM Filed April 1a, 1935 9 Sheets-Sheet b;

1 III II Feb. 19, 1935.

Feb. 19, 1935.

C. W. SCHREIBER CHARGE SEVERING MECHANISM Filed April 18, 1933 9Sheets-Sheet Feb. 19, 1935.

c. w. SCHREIBER gr AL CHARGE SEVERING MECHANISM v Filed April 18. 1935 9Sheets-Sheet 6 C. W. SCHREIBER- ET AL Feb. 19, 1935.

CHARGE SEVERING MECHANISM Filed April 18, 1953 9 Sheets-Sheet '7 Feb.19, 1935.

c. W. SCHREIBER El AL I 1,991,705 cHARqfi 'SEVERING- MECHANISMFiled'April 18, 195s '9 Shets-Sheet 9 Patented Feb. 19, 1935 UNITEDSTATES CHARGE SEVERING MECHANISM Carl w. Scln'eiber and John E.McLaughlin, Alton, Ill., assignors to Owens-Illinois Glass Company,

a corporation of Ohio Application'April 18, 1933, Serial No. 666,726

18 Claims.

The present invention relates to improvements in mechanism for severinggathered mold charges from a supply body of molten glass, and isparticularly adaptable for use in conjunction with 5 glassware formingmachines in which downwardly opening suction type blank molds are movedalong a closed path and brought in succession into contact with theexposed upper surface of a supply body of molten glass from which meas-10 ured charges are obtained.

An object of the present invention is the provision of a shear typecut-off common to all of the molds of a bottle forming machine andcapable of effecting separation of the gathered mold charges from'thesupplybody of glass without excessively chilling the bottom end of thecharges. This latter feature is of considerable importance in that ittends to reduce the size and depth of the cut-off scar and therebycontributes material- 1y to the production of quality glassware in whichthe bottoms are comparatively free from defects.

Another object is the provision of a novel type j of charge severingmechanism common to the mold groups of a rotary machine and in whichoperation of the mechanism is directly controlled by movement of themolds. Thus the speed of operation of the charge severing mechanism willbe automatically increased or decreased with and directly as a result ofvariations in the speed at which the forming machine is operated.

A further object is the provision of cut-off mechanism including shearsand a novel form of operating mechanism for the shears whereby they arecaused to quickly sever gathered mold due to contact with the cut-offknife or shears is greatly reduced.

40 Another object is the provision of charge severand forth between idleand working positions and caused to dwell momentarily in the workingposition prior to the actual cutting movement of the shears. Thusexcessive vibration resulting from movement of the-shears between saidpositions is removed prior to the actual cutting operation and as aresult the cutting level and its relation to the charging end of themolds are constant.

A still further object is the provision of a novel form of spring devicefor effecting relative movevment of the shear blades and means wherebyoperation of the device is directly controlled by. movement of theshears between working and idle' positions.

charges from the supply body and move out of contact with the glass.Thus chilling of the glass ing mechanism in which shears are moved backIt is also an object to provide means whereby the cutting level of theshears may be adjusted to compensate for variations in the length of theblank molds with which the machine is equipped.

Other objects will be in part apparent and in part pointed outhereinafter.

In thedrawings:

Fig. 1 is a perspective view of the charge severing mechanism.

Fig. 2 is a fragmentary sectional view with parts in elevation showingthe shears retracted.

Fig. 3 is a fragmentary plan view.

Fig. 4 is a detail fragmentary plan view with parts broken away and insection.

Fig. 5 is a fragmentary vertical longitudinal l5 sectional view showingin detail the shear operating mechanism.

Fig. 6 is a plan view illustrating more or less diagrammatically therelation between the charge severing mechanism and the blank molds of a29 bottle forming machine.

Fig. '7 is a transverse sectional view showing the control means for theshear operating device.

Fig. 8 is-a detail sectional view of part of the control mechanism.

Fig. 9 is a fragmentary sectional view showing the elevating mechanismfor the shears.

Fig. 10 is a sectional elevational view thereof.

Fig. 11 is a diagrammatic view showing the air pipe lines and the shearsretracted.

Fig. 12 is a view similar to Fig. 11, showing the shears projected.

Fig. 13 is a diagrammatic view showing a slight- 1y modified form ofapparatus.

In more or less general terms the present invention involves equipping arotary type bottle blowing machine with charge severing mechanismconsisting of a pair of shears common to all of the mold groups. Theshears which are arranged in proximity to the forming machine andcontainer for molten glass are at regular time intervals placed over thesupply body of glass in position to sever gathered mold charges from thelatter. In one form of the invention the shears are operated immediatelyupon reaching their fully projected position while in another form theyare allowed to rest a momentafter complete projection before actuallysevering the gathered mold charge. This latter method of operating theshears removes vibration from them in advance of the cutting movementand insures severance of the charges at a constant level and without anytendency to give the bottom end of the gathered charges a mushroom form.It is evident that projection of the shears and sudden stopping of theirforward movement may set up considerable vibration in the shear blades.

The charge severing unit 15 is arranged at one side of a rotary typebottle forming machine including an annular series of suction type blankmolds 16, said machine adapted to gather mold charges of molten glassfrom a supply body in a revolving pct 17 which includes an exposedathering area 18 defined in part by the jack arch 19 of a meltingfurnace (not shown). The charge severing unit includes shears 20 carriedby a horizontal ram 21 which is mounted in slideways 22 forreciprocation between two positions. While in their projected positionthe shears are operated to sever gathered mold charges from the supplybody and in the other or retracted position are at rest awaiting arrivalof one of the molds at the charging position preparatory to anotherprojection to the cutting position.

Reciprocation of the ram is obtained by means including a fluid operatedmotor 23, the operations of which are directly controlled by movement ofthe molds 16. This motor 23 is mounted at the upper end of a pedestal 24and includes a horizontal cylinder 25 arranged in a cradle 26 or carrierwhich in turn is bolted or otherwise separably connected to a plate 27at the upper end of said pedestal 24. A piston 28 in the cylinder 25 isconnected to a piston rod 29 which extends through one end of saidcylinder 25 and as shown in Fig. 11, has its outer end secured to theram 21. Air under pressure is supplied to the opposite ends of the motorcylinder 25 in alternation through pipes 30 which lead to a source ofsupply of air under pressure (not shown) by way of control devices aswill be brought out hereinafter. The motor is provided at its forwardend with an air cushioning device to reduce the shock incident tostopping forward movement of the piston 28. This device consists of acylinder 31 at the forward end of the motor, opening at one end into themotor cylinder and provided with a longitudinal series of small exhaustports 32. A piston 33 at the forward end of the piston rod 29 beyond themotor piston 28 is adapted for projection,

into said cylinder 31 slightly ahead of the time the ram reaches itsextreme forward position. It is evident that because of the size of theexhaust ports 32 pressure is momentarily built up in the ers 34 runningin opposed ways or tracks 22 in the inner vertical faces of the carriage35. The shears 20 are mounted at the forward end of the ram 21 andinclude a pair of cooperating blades 36 mounted upon the outer ends of apair of shear arms 37 which at their inner ends are journaled upon avertical hinge pin 38 rising from'said ram. The upper end of the hingepin is connected through a brace rod 39 to a housing 40 within which apart of the mechanism fog operating the shears is enclosed.

The shear operating mechanism includes spring means whereby the bladesare moved both toward and from each other at each end of the path ofreciprocation of the ram. The specific construction involved may be asfollows: Fingers 41 at the inner ends of the shear arms 3'7 areconnected through adjustable'rods 42 to a cross head 43'or bar, whichextends through a pair of opposed longitudinal slots 44 in the sidewalls of the housing 40. A rod 45 connected at its f rward end to saidcross head is slidingly supported in a guide 46 on the upper side of theram and within the housing 40. The other end of the rod 45 is connectedthrough a link 47 to the lower end of a bell crank lever 48, said leverbeing disposed in a vertical plane and straddling a tubular shaft 49 orsleeve which forms a part of the lever rocking mechanism as will beapparent presently. A hinge pin 50 on the upper side of this sleeve 49is connected at its ends to said bell crank lever 48. A bifurcated link51 is connected through the hinge pin '52 to the upper end of the bellcrank lever and at its other end is suitably connected to the forwardend of a push rod 53, the latter slidingly telescoped into said tubularshaft 49 or sleeve. A longitudinal slot 54 provided in the sleeve 49accommodates a connecting pin 55 through which the link 51 and push rod53 are secured together and allows for limited relative axial movementbetween said sleeve and rod. The cam roll 56 mounted at one end of thehinge pin 52 runs in a stationary cam 57 on the inner face of one of theside walls of the housing 40. This cam which is substantially V-shaped,provides means whereby the sleeve 49 and rod 53 move as a unit at timesand at other times are subject to relative axial-movement, suchmovements being essential to proper operation of the shears as will beapparent hereinafter.

The sleeve 49 referred to above consists of two sections suitablyconnected together and slidingly,

sion collar 63, the latter being slidingly fitted in I a guide 64attached to the upper side of the ram by suitable fasteners. A radialflange 65 is provided at the outer end of the spring compression collar63 for a purpose which will be apparent presently. The collar 63 isheldassembled with the sleeve 49 by means of nuts 65 or the like elements.limited by means of a pin 66 carried by the guide 64 and having itsinner end projecting into a longitudinal groove 6'7 or channel providedin the outer surface of said collar. A spring pressed detent 68 carriedby the 'guide 64 is adapted for projection into a. recess 69 in thelower side of said collar 63 for the purpose of releasably holding themain spring 62 compressed. Release of the collar from the holdinginfluence of said detent is obtained by rocking a lever 70 (Fig. 4)which is pivoted to a horizontal hinge pin 1. As will be apparenthereinafter this main spring 62 operates to bring the shear bladestogether for the purpose of severing the gathered mold charges Axialmovement of the collar 63 is' from the supply body. Separation of theshear blades which obviously requires less pressure than movement of theblades through a stream of said sleeve 49 and a collar '74 at the outerend of the push rod 53. A radial flange '75'at the outer end of thecollar '74 is adapted for engagement with a stationary stop as and forthe purpose set forth hereinafter. The rod 53 and collar 74 are heldassembled'by means of a locking nut 76.

Compression of springs 62 and 72 in succession prior to each projectionof the ram is obtained by bringing the radial flanges and 75 intoengagement with a stationary stop 77 which is suitably mounted upon themain carriage 35. This stop includes the housing 78 connected throughlegs 79 to said carriage. A sleeve 80 fits into the housing 78, saidsleeve having externally screw.

threads designed for engagement with an adjusting link 81. The ram bearsagainst the forward end of the housing '78 and may be adjusted toadvance or retard the position of the inner end of the sleeve whichengages the radial flange 65 on the spring compression collar 63. Withinthe sleeve 80, which has one end closed, is a second sleeve 82 intendedto engage the radial flange 75 on theinner collar 74. This inner orsecond sleeve 82 has threaded engagement with the sleeve 80 and isprovided with an axial stem 83 extend-' ing through the closed end ofthe outer sleeve 80 so that it may be engaged by any suitable implementin rotating said inner sleeve. Such rotation of the sleeve adjusts itsposition with respect to the sleeve. Either or both of these adjustmentsmay at times become necessary in orderthat the collar 63 will beproperly engaged by the detent 68 and the springs compressed to thenecessary degree.

Operation of the ram reciprocating-motor 23 and rocking of the leverv'70 for releasing the shear actuating springs, are controlledandeffected in timed relation with movement of the molds 16 of the formingmachine. The construction involved may be substantially as follows: Theair supply pipes 30 connected to the opposite ends of the ramreciprocating motor 23 lead to a reversing valve 84 (Fig. 11) the pipesbeing threaded into openings in the valve housing 85. A main supply pipe86 connectedto an'air pressure tank 87, is threaded into an'opening inthe housing 85 at a point centrally between the points of connection ofthe pipes 30 to said housing Within the valve housing 85 which is ofcylindrical form, is a reciprocating differential piston 88, said pistonformed with two continuous channels 89 in its periphery, which are sospaced apart and of such'dimensions that when the piston 88 is in oneposition the supply pipe 86 communicates with one of the air lines 30and in its other position said supply pipe 86 is brought intocommunication with the otherair line 30. Reciprocation of the piston atregular time intervals in order to reverse the operation of the ramreciprocating motor 23 is obtained by applying air under pressure to theopposite ends of the housing 85.- A supply pipe communicating with theair supply tank 87 is connected to one end ofsaid hous=- ing andprovides for constant application of air to the correspondingend of thepiston 88 which end is of less area than the other in so far as thatportion to which air is applied is concerned. A pipe 91 opens into theopposite end of the valve housing 85 and is indirectly connected to thesource of supply of air under pressure as will be brought out presently.A solenoid controlled gate valve 92 in the supply line 86 is openedautomatically in timed relation with movement of the molds 16 past agiven point to thereby permit flow of air under pressure to said valve84 and thence to the opposite ends of the ram. reciprocating motor inalternation. The solenoid 93 is connected through lines 94 to a relay 95andthence tea limit switch 96. This limit switch is connected throughcurrent conductors 97 and a switch 98 to the main power line 99. Thelimit switch is operated at regular time intervals by cams 100individual. to and rotating with the molds 16.

Complete projection of the ram bringing the shears20 to the chargesevering position is followed immediately by rocking of the lever 70 andexpansion of a main spring 62 and immediately thereafter, the expansionof the spring 72. Such expansion-of the springs brings, the shear bladestogether for the purpose of severing the stream or string of glass fromthe gathered mold charges and separation of the blades immediatelyfollowing the cutting stroke. The mechanism for moving the lever '70 maywell be constructed as follows: A trip device 101 (Figs. 7, 8, and 11)is mounted on one side of the main carriage 35 near the front endthereof directly below the path of travel of the outer end of said lever'70. This trip device includes a vertical air' cylinder 102 and a piston103 therein carrying a plunger 104-or pin which extends upwardly throughsuitable guides provided in said cylinder. A coil spring 105 yieldinglyholds the piston 103 at the lower end of the cylinder. Air is suppliedto the lower end of the cylinder through a pipe 106. A conduit 10'?formed in the cylinder wall leads to a chamber 108 at the upper end ofthe cylinder. A valve 109 normally closed'by a spring 110 is opened byupward movement of the piston 103 to permit flow of air from saidchamber 108 to the pipe 111 which leadsto the air pipe 91 referred toheretofore as being connected to one end of the reversing valve 84. Atrip valve 112 (Figs. 8 and 11) arranged in proximity to and rearwardlyof the trip device 101, controls the application of air under pressureto said device as well as to one end of the reversing valve 84. Theconstruction of the trip valve 112 includes a horizontal cylinder 113fixed to the ram carriage 35 and connected to the pipe 106 and a supplyline 114 which at its other end communicates with the interior of thehousing 85 of the reversing valve 84. The pipe 106 (Figs. 8 and 11)communicates with the interior of the trip valve cylinder 113 betweentwo opposed valve seats 115. A spool valve 116 (Fig. 8) consisting oftwo separable sections (as is customary and well known) .is providedwith opposed stems 117' slidingly supporting it in the cylinder 113. Acoil spring 118 normally holds the valve in position to shut offcommunication between the pipes 106 and 114. At the other side of thevalve a coil spring 119 encircles the stem 117 providing yieldingconnection between said stem and the adjacent end sectionof the valve116. An adjustable stop 120 carried by the ram 21 is adapted to engagethe adjacent end of the stem 117 upon a predetermined degree ofprojection of the ram and thereby actuate the valve 116 for the purposeof establishing communication between the pipes 106 and 114.- Thus airis supplied to the lower end of the cylinder and projects the plunger104 into engagement with the lever 70.

Upon completion of each cycle of operations and closing of the valve 116to shut off communication between the pipes 106 and 114, it is necessaryto exhaust the air from said pipe 106 as well as the interior of thetrip cylinder 102. An exhaust port 121 in the trip valve cylinder 113permits exhaust or air from the pipe 106. A relief valve 122 (Figs. 8and 11) connected to the pipe 111 is actuated at'the moment the ramreaches its fully retracted position. This valve includes a cylinder 123provided with an exhaust port 124 and a valve body 125 normally held inclosed position by a, spring 126. A stem 127 carried by the valve body125 is adapted to engage an adjustable stationary stop 128 which issuitably mounted upon the front end of the ram 21 and in such positionthat it engages the valve stem 127 during retraction of the ram.

Manually operable valves 129 (Fig. 11) provide means whereby the airsupply may be shut'oif from the ram reciprocating motor. Automatic checkvalves 130 are provided in certain of the pipes to prevent backing up ofpressure where it would be objectionable.

In view of the fact that the flow of air under pressure to the oppositeends of the ram reciprocating motor is controlled and regulatedby asolenoid actuated valve 92 (Fig. 11), operation of this valve obviouslydepends upon a continuous availability of a supply of electric current.Provision is made whereby in the event of power failure the ram motorwill be operated to retract the ram and thereby place the shears intheir inoperative position. The construction in this connection issubstantially as follows: The air supply tank 87is connected through apipe 131 (Fig. 11) to the supply pipe 30 which provides forcommunication between the front end of the ram reciprocating motor 23and the reversing valve 84. A solenoid operated valve 132 in this pipe131 is normally held closed by an energized solenoid 133 which isconnected through conductors 134 and a switch 135 to the power supplyline 99. Obviously, so

long as electric current is supplied to the solenoids 93. and 133, theentire mechanism may be operated in a normal fashion. In the event ofpower failure the valve 92 will be closed due to the fact that thesolenoid 93 cannot be energized and the core thereof immediately movesdownward by gravity and carries with it the valve 92. At the same timethe solenoid 133 will likewise become deenergized resulting in downwardmovement of the core and opening of the valve 132. Because the tank 87contains a sufficient amount of air under pressure to move the piston 28or ram reciprocating motor 23, it is evident that the ram will beretracted due to the flow of air through the pipe 131, valve 132, andpipe 30 leading to the front end of the motor 23.

In the following description of the operation it will be assumed thatthe ram 21, and, therefore, the shears occupy their fully retractedposition and one of the blank molds 16 is just approaching the chargesevering position. It is understood that air under pressure is appliedconstantly to the small end of the piston 88 constituting part of thereversing valve 84 so that normally said valve is in position to permitapplication of air to the back end of the ram reciprocating motor 23immediately upon opening of the valve 92. Upon arrival of the blank moldat a predetermined point the cam traveling therewith actuates the limitswitch so that the solenoid 93 connected thereto, is energized and opensthe valve 92. Immediately air. under pressure flows through the pipe 86to the annular channel 89 at the left end of the piston 88 (Fig. 11) andthence through the pipe 30 to the ram reciprocating motor 23. Thisresults in forward movement of the piston 28 and consequent projectionof the shears to the cuttingposition. Substantially at the time the ramreaches its fully projected position the stop moves the spool valve 116to the right (Figs. 11 and 12) establishing communication between thepipes 106 and 114.

right in Fig. 2. Through the rod 45 (Fig. 2) and links 42 the shearblades are moved toward each other about thehinge pin 38. Thus thegathered mold charge is severed from the supply body. This unitarymovement of the sleeve 49 and push rod53 is in part the result of thecam roll 56 riding in the lower horizontal portion of the stationary cam57'. The actual cutting operation will be complete at the time the camroll reaches the inner end of said horizontal portion. Immediately uponcompletion of the cutting operation and arrival of the cam roll 56 atthe inner end of said horizontal portion of the cam 57 preparatory toupward movement of the roll in the substantially vertical part of thecam, thecoil spring 72 expands causing relative movement between thelever 48 and link 51 and, therefore, between said sleeve 49 and push rod53. This results in a quick forward movement of the rod 45 whichoperates through the links to separate the shear blades 36. Thus thecharge severing operation is completed and the shears opened.

Retraction of the ram and therewith the shears 20 quickly follows theabove described movement of the shear blades. This involves reversing ofthe position of the piston 88 from that shown in Fig. 11, to thatindicated in Fig. 12. At the time the piston 103 and plunger 104 moveup- .wardly to operate thelever 70, the valve 109 is opened so that airunder pressure flows through the conduit 107 past said valve 109 andthrough said pipes 91 and 111 to the right end of the reversing valve.The piston 88 is thereby moved completely to the left end of the cyhnder(Fig. 12) and because the valve 92 is still opened, air under pressurefrom the tank 87 flows by way of the pipe 86 and the annular chamber 89at the right end of the piston 88 to thepipe 30 which is connected tothe front end of the motor 23. Immediately upon completion of the ramretracting operation th'e limit switch 96 is closed with the result thatthe valve 92 is closed under the the relief valve 122 is operated topermit complete removal of the air pressure which may have been retainedin the cylinder 102. As stated heretofore, power failure results inclosing the valve 92 and opening of the valve 132, the latter operationpermitting flow of air under pressure to the front end of the motor 23and consequent complete retraction of the ram with the shears 20.

Retraction of the ram first brings the flange 75 on the collar 74 intoengagement with the sleeve 82, thereby compressing the coil spring72which encircles a part of the push rod 53. Immediately thereafter andwith continued retraction of the ram, the radial flange 65 on the springcompression collar 63 is brought into'contact with the outer sleeve 80and additional retractive movement of the ram compresses the main spring62 su-fliciently to bring the collar. 63 into pressed detent 68. Thusthe mechanismis again ready for projection to the cutting position. x

The ram carriage and parts supported thereon are readily adjustablevertically in order to compensate for variations in the length of themolds of the forming machine and thereby insure proper clearance betweenthe shears and charging end of the molds. The construction involvedconsists of a vertical column 136 rising from a base 137 and telescopedover the pedestal 24, the latter carrying a key 138 fitted into a way139 in said column. A worm 140 within the pedestal meshes with a collar141 carried by a bevel gear 142, the latter meshing with a pinion 143 atthe inner end of a horizontal shaft 144. By rotating a crank 145 at theouter end of said shaft the pedestal 24 may be adjusted vertically inthe column 136. This column is split vertically and provided with a lockscrew 146 by means of which it may be expanded and contracted in orderto "free the pedestal for adjustment and/or securely hold it againstmovement.

In another form of the invention '(Fig. 13), provision is made wherebythe ram and shears after complete projection preparatory to severing agathered mold charge of glass from the supply bodyis followed by ashortrest period just in advance of the actual cutting operation. This restperiod allows complete removal of vibration from the shears and uniformclearance between the shears and molds. As a result, squeezing of theglass laterally beyond the margin of the mold charging opening betweenthe shears and mold bottoms and variations in the length of the blanksbecause of cutting at different levels are avoided. The constructioninvolved may be substantially as follows: The mechanism generally issubstantially as shown in Fig. 11 (the preferred fonn), the mainexception being that the trip valve 112 and stop 120 are omitted and inlieu thereof a pipe 147 leads directly from the air pressure tank 87 tothe lower end of the trip cylinder 102. A solenoid operated valve 148 inthe pipe 147 is connected to a solenoid 148 and thence throughconductors 148 to a limit switch 149 which may be arranged in proximityto but rearwardly of the limit switch 96. A cam 150 is arrangedrearwardly of each of the cams 100 and in such relation thereto that itactuates the limit switch 149 after the limit switch 96 has beenoperated and the ram completely rejected; Thus actual cutting movementof the shear blades does not take place until after a rest period on thepart of the ram and shears at the charge severing position. This allowscomplete removal of vibration from the shears as pointedout above.Modifications may be resorted to within the spirit and scope of theappended claims.

What we claim is:

1. In-combination, a rotary mold carriage, an annular series of suctiontype blank mold groups thereon, means for continuously rotating the ingsaid. utter to sever gathered. mold charges from the supply body,said-cutter actuating 'meansincluding a device, and means wherebymovement of the cutter between the idle and working positions effectsoperative positioning and operation of the spring device.

2. Charge severing mechanism including a pair of shears, a horizontalram supporting the shears atone end, means slidingly supporting saidram, means for reciprocating the ram to thereby move the cutter betweencutting and rest positions, and means for opening and closing the shearsincluding spring devices operated by reciprocating movement of said ram.

. 3. Charge severing mechanism including a horizontal ram, meansslidingly supporting the ram, a pair of shear blades at one end of them. means for reciprocating the ram to thereby alternately place theshear blades in cutting and rest positions, means for moving the shearblades toward and away from each other, including links, a cross head towhich the links are connected, and spring means operated in part bymovement of the ram to actuate the cross head and thereby move saidblades toward and away from each other.

4. Charge severing mechanism including a horizontal ram, means slidinglysupporting the ram, a pair-of shear blades at one end of the ram, meansfor reciprocating the ram to thereby alternately place the shear bladesin cutting and rest positions, means for moving the shear blades towardand away from each other, including links, a cross head to which thelinks are connected, a series of levers pivoted together, meansconnecting one of the levers and the cross head,

spring means for moving said levers, a cam roll on one lever, and a camengaging the roll and shaped to in part control the path of movement ofthe levers so that the shear blades close and 4 open at each end ofthepath of reciprocation of the ram. I

5. Charge severing mechanism including a horizontal ram, means slidinglysupporting the ram, a pair of shear blades at one end of the ram, meansfor reciprocating the ram to thereby alternately place the shear bladesin cutting and rest positions, means for moving the shear blades towardand away from each other, including links, a cross .head to which thelinks are contoward and away from each other, includinglinks, a crosshead to which the links are connected, an elongated sleeve mounted aboveand parallel with the ram for limited axial movement relative to thelatter, a rod extending axially through said sleeve, a lever pivoted tothe sleeve and connected at one end to the cross head, means pivotallyconnecting the other end of said lever and the adjacent end of said rod,means for moving the rod and'sleeve together a predetermined distance toclose the shear blades, and means for effecting relative axial movementbetween said rod and sleeve to separate said blades.

'7. Charge severing mechanism including a horizontal ram, meansslidingly supporting the ram, a pair of shear blades, at one end of theram, means for reciprocating the ram to thereby alternately place theshear blades in .cutting and rest positions, means for moving the shearblades toward and away from each other, including links, a cross head towhich the links are connected, an elongated sleeve mounted above andparallel with the ram for limited axial movement relative to the latter,a rod extending axially through said sleeve, a lever pivoted to thesleeve and connected at one end to the cross head, means pivotallyconnecting the other end of said lever and the adjacent end of said rod,a coil spring encircling a part of said sleeve and operable to move therod and sleeve together a predetermined distance and thereby bring theshear blades together, and a spring within the sleeve and encircling aportion of said rod to effect relative axial movement between the rodand sleeve to thereby separate the shear blades.

8. Charge severing mechanism including a horizontal ram, means slidinglysupporting the ram, a pair of shear blades at one end of the ram, meansfor reciprocating the ram to thereby alternately place the shear bladesin cutting and rest positions, means for moving the shear blades towardand away from each other, including links, a cross head to which thelinks are connected, an elongated sleeve mounted above and parallel withthe ram for limited axial movement relative to the latter, a rodextending axially through said sleeve, a lever pivoted to the sleeve andconnected at one end to the-cross head, means pivotally connecting theother end of said lever and the adjacent end of said rod, means formoving the rod and sleeve together'a predetermined distance to close theshear blades, means for effecting relative axial movement between saidrod and sleeve to separate said blades, and means including a stationarycam for moving said lever and thereby effecting operation of the shearblades.

9. In combination, a rotary typebottle forming machine including anannular series of molds, a container for a supply body of glass fromwhich mold charges are obtained at regular time intervals and deliveredto the molds, charge severing mechanism arranged at one side of themachine and container and including a cutter, means including aplurality of fluid operated motors for moving the cutter back and forthbetween cutting and rest positions and actuating said cutter causing itto sever gathered mold charges from a supply body of glass, means forsupplying air under pressure to the motors, solenoid operated valves forregulating and controlling the flow of air under pressure to the motors,and switches actuated by movement of the molds to energize the solenoidsin a predetermined order.

10. Charge severing mechanism comprising a horizontal ram mounted forreciprocation along a horizontal path, a vertical hinge pin at one endof the ram, shear arms journaled on said pin,

blades on said arms, a cross head, links connect-.

11. Charge severing mechanism comprising a horizontal ram mounted forreciprocation along a horizontal path, a'vertical hinge pin at one endof the ram, shear arms journaled on said pin,

blades on said arms, a cross head, links connecting the cross head andshear arms, means for moving the cross head back and forth in the direction of the length of the ram to thereby move the shear blades towardand away from each other, said last named means including an elongatedsleeve mounted for axial reciprocation lengthwise of said ram, a pushrod within the sleeve, a plurality of levers connecting the rod, sleeve,and cross head together, means for moving the rod and sleeve together apredetermined distance to impart cutting movement to the shear blades, acam adapted to effect relative movement between certain of the leversduring axial movement of the rod and sleeve causing relative axialmovement between said rod and sleeve and separation of the shear blades,and means for reciprocating said ram to thereby alternately place theshear blades in working and rest positions.

12. Charge severing mechanism comprising a horizontal ram mounted forreciprocation along a horizontal path, a vertical hinge pin at one endof the ram, shear arms journaled on said pin,-

blades on said arms, a cross head, links connecting the cross headandshear arms, means for moving the cross head back and forth in thedirection of the length of the ram to thereby move the shear bladestoward and away from each other, said last named means including anelongated sleeve mounted for axial reciprocation lengthwise of said ram,a push rod within the sleeve, a plurality of levers connecting the rod,sleeve, and cross head together, means for moving the rod and sleevetogether a predetermined distance to impart cutting movement to theshear blades, a cain adapted to efiect relative 'movement betweencertain of the levers during axial movement of the rod and sleevecausing relative axial movement between said rod and sleeve andseparation of the shear blades, means for reciprocating said ram .tothereby alternately place the shear blades in working and restpositions, said means for imparting axial movement to the rod and sleeveincluding expansible coil springs individual to the rod and sleeve, andmeans for placing the springs under tension substantially at the timethe shear blades reach the rest position.

13. In combination, a pair of shears, a; horizontal ram carrying saidshears at one end and mounted for reciprocation to thereby alternatelyplace the shears in cutting and rest positions, means for actuating theshears, a fluid operated motor for reciprocating the ram and shears,separate devices for controlli% theoperations oi the motor and shearactuating means, and means for operating said devices in succession andin a fashion to allow the ram to rest a period of time in its projectedposition in advance of actuation of the shears.

14. In combination, a pair of shears, a. horizontal ram carrying saidshears atone end and mounted for reciprocation to thereby alternatelyplace the shears in cutting and rest positions, spring means forimparting cutting movement to the shears, a'fluid operated motor forreciprocating the ram and shears, an air operated trip device forcontrolling operation of the shear actuating means, solenoid operatedvalves individual to the ram reciprocating motor and trip device, andmeans whereby the solenoid valves are op- I erated in succession and insuch timed relation that the ram is allowed to rest a predeterminedperiod of time in its projected position prior to actuation of theshears.

15. Charge severing mechanism comprising a horizontal ram, a pair ofpivoted shear blades at one end of the ram, means for reciprocating theram to thereby place the'shears in cutting position periodically, meansincluding a coil spring for moving the shear blades about their pivotwhile in cutting position, and means operable during movement of the ramaway from said cutting position for compressing the spring preparatoryto a succeeding operation of the shears.

16. Chargesevering mechanism comprising a horizontal ram, a pair ofpivoted shear blades.

at one end of the ram, means for reciprocating the ram to thereby placethe shears in cutting position periodically,.means for moving the shearblades about their pivot while in cutting position including a coilspring, means for compressing the coil spring, and means for releasingthe spring and allowing it to expand while the shears are in saidcutting position.

17. Charge severing mechanism comprising a horizontal ram, a pair ofpivoted shear blades at one end of the ram, means for reciprocating theram to thereby place the shears in cutting position periodically, meansfor moving the shear blades about theirpivot while in cutting positionincluding a coilspring, means operated by movement of the ram away fromthe cutting position for compressing the spring, and means operated bymovement of the ram to said cutting position for releasing the springand thereby actuating the shear blades.

18. Charge severing mechanism comprising a horizontal ram, a pair ofpivoted shear blades at one end of the ram, means for reciprocating theram to thereby place the shears in cutting position periodically, springmeans for moving the

